Polymeric films for use on superconducting power transmission cables

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6876174

Muller, A C

Research on the development of electrical insulation for a flexible, helium-cooled superconducting cable for a 138 kV underground power transmission system is reported. Solid, polyethylene or polypropylene tapes were found to best satisfy dielectric requirements. The antioxidant was found to be the major source of dielectric loss at 100 Hz and 4.2/sup 0/K, and the selection of the proper type and concentration of antioxidant kept tan delta within design limits. Acceptable values of yield strength and tensile moduli were obtained with several 25 ..mu..m-thick, biaxially-oriented, polypropylene films laminated to obtain the required tape thickness. Biaxial orientation was also found to reduce thermal contraction and increase the 4.2/sup 0/K elongation of the polypropylene films. Work has been started to develop a very high modulus, single layer polyethylene tape for use with higher voltage superconducting cables.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 6876174
• Report Number(s): BNL-24443; CONF-781110-3
• Country of Publication: United States
• Language: English

Related Subjects

200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
CABLES
CONDUCTOR DEVICES
CRYOGENIC FLUIDS
DESIGN
DIELECTRIC MATERIALS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELEMENTS
EQUIPMENT
FABRICATION
FILMS
FLUIDS
HELIUM
HVAC SYSTEMS
LAYERS
NONMETALS
POLYMERS
POWER SYSTEMS
POWER TRANSMISSION
RARE GASES
RESEARCH PROGRAMS
SPECIFICATIONS
SUPERCONDUCTING CABLES
UNDERGROUND POWER TRANSMISSION